Phone Log Parsing and Billing | Dataford Interview Questions

Write a function which parses a string describing a phone log, calculates how much to charge for each call, and includes test cases as needed.

Implement def calculate_call_charges(log):; log contains newline-separated records in the form HH:MM:SS, phone_number, where the first field is the call duration, and return a list of dictionaries in input order.

Charge calls of 5 minutes or less at 3 cents per second; longer calls cost 150 cents for each started 5-minute block. Ignore blank lines, preserve the trimmed phone number, and assume nonblank records are valid.

Constraints

1 <= number of nonblank records <= 5000
Each duration has the form HH:MM:SS and represents a nonnegative duration
Each phone number is nonempty after trimming
Each nonblank record contains exactly one comma separating duration and phone number
All charges must be returned as integer cents

Function Signature

def calculate_call_charges(log):

Your question is Phone Log Parsing and Billing. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Write a function which parses a string describing a phone log, calculates how much to charge for each call, and includes test cases as needed.

Constraints

1 <= number of nonblank records <= 5000
Each duration has the form HH:MM:SS and represents a nonnegative duration
Each phone number is nonempty after trimming
Each nonblank record contains exactly one comma separating duration and phone number
All charges must be returned as integer cents

Function Signature

def calculate_call_charges(log):

Your question is Phone Log Parsing and Billing. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.